Rotary refrigerating machine



E. W.-WALDENER ROTARY REFRIGERATING MACHINE Aug. 20, 1929.

Filed Sept. 20, 1926 PatentedAug. 20, 1929 UNI ED-STATES "PATENT-OFFICE.

EBIK-WILEELM wALDENnB, or mIvBo, m3. snnnnnm,swnnm.

- norms. nnrnrenaa'rme mcnmn Application filed September 20, 1926, Sefl'alRo 138,568, and in Sweden Jilly 16, 1924. i

The present invention relates to an improvement 1n such rotary refrigerating machines which consist of a cooler or refrigerator and a rotary condenser connected with said refrigerator, as well as a compressor for drawing the cooling fluid from the refrigerator and for compressing the same in the condenser, said compressor being driven during the rotation of the machine through cooperation with a weight suspended in t e machine but not entramed in the rotation thereof. The cooler or refrigerator rotates in the liquid or the like, for instance a solution of common salt, which it is desired to cool, and from the cooler the compressor draws the coolin fluid which, when evaporating in the coo er, takes up heat from the liquid surrounding the cooler, after which the compressor compresses said cooling fluid in the condenser whereby heat is liberated which is removed, as a rule, by the condenser rotating in cooling water. The coolin fluid compressed and condensed irito liqui state is again introduced into the cooler, and the tively to each other,

cooling fluid thus passes in a continuous circulation through the cooler and the condenser.

According to the present invention the compressor is located in the condenser conaxially with the axis of rotation of the machine. By this arrangement a good balancing of the machine is obtained, and also that the dimensions of the machine may he inade comparatively small, whereby it becomes possible to make refrigerating machines cording to this invention for comparative] small cooling effects. The compressor is pre erably made as apiston compressor, and in such case the piston of the compressor is located coaxially with the axis of rotation of the machine. The compressor piston is preferably provided with a cam which 'is embraced by rollers carried by the stationary weight, so that in this manner the compressor piston will be caused to perform a reciprocating movement during the rotation of the machine.

A further. characterizing feature of the invention is that the suction conduit from the cooler to the compressor is quite continuous and uninterrupted,since it is formed of parts which are fixed and immovable relaso that there can be no such leaks which are unavoidable when the piston.

suction conduit is made up of. parts movable relatively to each other.

Still another feature of the invention consists in that tubes which reach 'close to the periphery of the condenser, are secured to.

In the accompanying drawing an embodiment of a rotary refrigerating machine according to the invention is illustrated by way of example. Fig. 1 shows an axial section through the condenser and the cooler, and

Fig. 2 shows a cross section of the condenser on the broken line IIII in Fig. 1.

The machine comprises a cooler or refrigerator 1 having the shape of a hollow ball or the like whlch, as above mentioned, rotates in the 'solution of salt, or the like, which it is desiredto cool. The cooler 1 is secured to a shaft 2 which supports at its other end the condenser 3 which is also supported by a second shaft 4. The shafts 2 and 4 are supported in bearings 5 and 6, respectively, and to the shaft 4 a pulley 7 is attached by means of which rotational movement is transmitted tosaid shaft, so that the condenser 3 and the cooler 1 are caused to rotate.

The shafts 2 and 4 are provided at their opposim ends with enlargements 8 and 9, respectivel which carry arcuate arms 10 and 11, respectively, the ends of which overlap and are joined together by means of screws 12. Hemisphericai caps 13 and .14 are placed outside said arms and are retained in position by means of nuts 15 and 16 screwed on to threaded portions of said enlargements 8 and 9, the adjoining edges of said capsbeing joined by means of solder 17 or in other suitable manner. Said caps thus form together a spherical chamber which constitutes the condenser.

Each of the enlargements 8 and 9 is provided with an axial cylindrical bore 18 and 19, respectively, in each of which there is inserted a cylindrical sleeve 20 and 21, re-' spectively, the interior of which forms a com-.

pressor cylinder. In the shaft 2 there is an axial bore 'or passage '22 leading from the cooler 1 to the cylinder 20 from which it is separated by a suction valve 23. The shaft and 21 and is provided at each end with a pressure valve 28 which closes a central passage 29 in said piston, which passage 29 com-- municates throu h a number ofholes 30 with the interior of t e condenser 3. The piston 27 is provided with a number of longitudinal .flutes or grooves 31 in which are placed balls 32 which also roll in longitudinal flutes or grooves 33 insleeves 34 which are secured in the bores 18 and 19 in the enlargements 8 and 9. Said balls 32 will thus guide the reciprocating movement of the piston and will also cause the piston to be entrained in the rotational movement of the shafts 2 and 4 and condenser 3. The piston 27 is also provided with a cam 35 the purpose of which is described here below.

A cage consisting of two rings 36 and 37 and two cross-pieces 38 and 39 joining said rings, is supported in the condenser by means of ball bearm s 40 which are placed coaxial- -l with the axls of rotation of the condenser. X weight 41 is attached to said cageby means of bolts 42. From the upper cross-piece 38 two studs 43 project downwards and support at their lower ends rollers 44 which roll against opposite sides of the cam 35 on the piston 27. S'aid studs 43 are screw-threaded into blocks 45 which are slidable in the axial directioh in the cross-piece 38, and which may be adjusted by means of screws 46 threaded into said cross-piece. 38, in such. manner that the rollers 44 may be caused to bear without play against the cam 35. Said 50 are secured at the en studs 43 are tubular, and to the u perends of the same tubes 47 are secured w 'ch'serve to conduct'condensed' cooling fluid from the inner circumference of the condenser. through said tubes and said studs inwards to the piston in order to lubricate the same. A centrally located tube 48 leads to a passage 49 in the upper cross-piece 38 and serves to conduct condensed cooling fluid to the blocks 45 fromwhich said fluid will flow to the rollers 44 and lubricate these (partfsyhother tubes s o t e cross-piece 38 and serve to conduct condensed cooling fluid. to the ball bearings 40. Inthe outer" end of each tube 47, 48, and 50 there is inserted a small artition 61 located in an axial plane, and sai outer ends of the tube are cut ofi obliquely on both sides towards the upper edge of said partition as shown in Fig. 2, so as to provide an easy access for the cooling fluid om both sides.

A tube 51 leads from the inner circumfer ence of the condenser 3 to a passage in the enlargement 8, which passage is continued b a tube52 located in the bore 22 in the sli aft 2, and the other end of which ends in a small chamber 53 in a button 54 secured to the coolenl. In said button 54 a nozzle 55 having 'a-limited areaof flow is inserted. The button 54,is also provided with. passages 56 through which the cooling fluid discharged through the nozzle 55, can flow out into the cooler 1. A screw 57 is threaded into the button 54, so that after removing said screw 57 thenozzle 55 maybe detached and replaced by another nozzle in order to obtain some.

; other desired area of the outlet openin in the nozzle. On to the screw threaded en of the shaft 2 amp 58 is screwed which secures the cooler 1 to said shaft 2, and which is provided with apertures 59in order to allow the cooling fluid to be drawn from the cooler into the bore 22 in said shaft.

The bore 24 in the shaft 4 serves for filling the machine with cooling fluids. Said bore is' closed by means of a screw 60. 5 1

, When the, machine is put in rotation the compressorpiston 27 will'be entrained by the balls'32, whereas'the cage 36, 37, 38, 39 and the weight 41 will remain approximately in the position illustrated, and will thus maintain the studs 43 supporting the rollers 44 stationary with relation. to the rotating parts. Since said cage is supported and guided by the ball'bearings 40 and is thus prevented from movement in the axial direction, owing to the engagement of the rollers 44 with the cam 35-the' compressor' piston 27 will be caused to reci rocate in the cylinders 20 and 21 upon rotation of the machine. The cooling fluid in the cooler -1 will therefore 'be }-'drawn through the apertures 59 and the bore '22 in the shaft 2 past the suction valve 23 into the c linder 20 and also from said bore 22 through the tube 26 andpast the suction valve 25 into the cylinder 21, the cooling fluid, when expanding in the cooler, taking up and bringing along heat from the li uid surrounding the cooler 1. This coolingi'luid is now compressed in the cylinders and is forced out of the cylinders past the pressure valves 28 and through the passage 29 and holes 30 into the condenser 3, the heat thus given off being takeniup by the cooling water or other medium surrounding the condenser. The' compressed and condensed cooling fluid is forced by the rotation out against the inner circumference of the condenser. Owing to the pressure prevailing in the condenser such condensed cooling fluid is forced through the tubes 51 and 52, the chamber'53, nozzle 55 and passages 56 back into the cooler 1, the opening in the nozzle 55 being such that the correct difference of pressure is maintained between the conenser and the cooler. The chamber 53 serves to collect foreign particles possibly present in the cooling fluid.

During the rotation of the machine a ortion of .the condensed cooling fluid will forced into the tubes 47 48 and 50 through which it will flowdownwa rdsland lubricate the moving parts'withinthe condenser, as previously explained, namely the rollers 44 v and the paths of said rollers on the cam 35,

the compressor piston 27, and the balls 32 and grooves 31 and 33 for said balls, as well as the ball bearings 40. Owing to the ends The invention is, of course, not limited to the embodiment above described and illustrated in the drawin since it will be understood that the detai s of the same may be modified in various respects without departin from the principle of the invention.

I claim:

1. In a rotary refrigeratin machine the a combination of a rotary con enser, a compressor located within and rotated with said condenser and having a piston located coaxially with the axis of rotation of said condenser, means whereby. said piston is guided axially but pre ented from rotation relatively to said condenser, a weight pivotally mounted in said condenser in such manner as to be substantially stationary during rotation of' said condenser, means connectlng said compressor piston to sa1d welght in such manner as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compresor.

2. In a rotary refrigerating machine the combination of a rotary condenser, a compressor located within and rotated with said condenser and having a piston located coaxially with the axis of rotation of said condenser, means whereby said piston is guided axially but prevented from rotation relatively to said conderser, a cam on said piston, a weight pivotally mounted in said condenser in such manner as to be substantially stationary during rotation of said condenser, rollers carried by said weight and embracing said cam on said piston from opposite sides so as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compressor.

3. In a rotary refrigerating machine the combination of a rotary condenser, a compressor having a cylinder located within and rotated with said condesner, and having a piston in said cylinder located coaxially with the axis of rotation of said condenser, said piston being provided with longitudinal grooves, said cylinder being provided with corresponding longitudinal grooves, balls in.-

serted in said grooves in said piston and said cylinder, said piston being provided with a cam, a weight pivotally mounted in said condenser m such manner as to be substantially stationary during rotation of said condenser,

rollers carried by said weight and embracing sa1d cam on said piston from op osite sides 'so as to cause said piston to per orm longitudinal reciprocating -m'ovements during roitation of said condenser, a cooler connected to sa1d condenser, and a suction conduit from,

said cooler to said compressor.

v4:. In a rotary refriger'atin' machine the combination of a rotary con enser, a coma pressor located within and rotated with said condenser and having a piston located coaxially with the axis of rotation of said condenser, means whereby said piston is guided axially but prevented from rotation relatively to 'said condenser, a cam on said piston, a

weight pivotally mounted in said condenser in such manner as to be substantially stationary durin rotation of said condenser, blocks. adjusta le in said weight, rollers carried by said blocks and embracing said cam on said piston from opposite sides so as to cause said piston to perform longitudinal reciprocating mbvements during rotation of said condenser, a cooler connected to said 1 condenser, and a suction conduit from cooler to said compressor.

5. In a rotary refrigeratin machine the combination of a rotary condenser, a comsaid presor having a cylinder located within and rotated with said condenser, and having a piston in said cylinder located coaxially with the axis of rotation of said condenser, said piston being provided with longitudinal .grooves, said cylinder being provided with corresponding longitudinal grooves, balls inserted in said grooves in sa1d piston and said cylinder, said piston being provided with a cam, a weight pivotally mounted in said condenser in such manner as to be substantially stationary during rotation of said condenser, blocks adjustable in said weight, rollers carried by said blocks and embracing said cam on said piston from opposite sides so as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compressor.

6. In a rotary refrigerating machine the combination of a rotary condenser, said conioo denser consisting of two opposing yokes joined to one another, and two surrounding tionary during'rotation of said condenser,

means connecting said compressor piston to said weight in such manner as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said'condenser and a suction conduit from said cooler to said compressor.

7. In a rotary refrigerating machine the combination of a rotary condenser, said condenser consisting of two opposing yokes joined to one another, and two surrounding caps joined to each other and supported by said yokes, a compressor located within and rotated with said condenser and having a piston located coaxially with the axis of rotation of said condenser, means whereby said piston is guided axially but prevented from rotation relatively to said condenser, a cam on said piston, a weight pivotally mounted in said condenser in such manner as to be sub stantially stationaryduring rotation of said condenser, rollers carried by said weight and embracing said cam on said piston from opposite sides so as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compressor, said suction conduit being formed of relatively to each other fixed and immovable parts.

8. In a rotary refrigerating machine the combination of a rotary condenser, said condenser consisting of two opposing yokes joined to one another, and two surrounding caps joined to each other and supported by said yokes, a compressor having a cylinder located within and rotated with said condenser, and having a piston in said cylinder located coaxially with the axis of rotation of'said condenser, said piston being provided with longitudinal grooves, said cylinder being provided with corresponding longitudinalgrooves, balls inserted in said grooves in said-piston and said cylinder, said piston being provided with a cam, a weight pivotally mounted in said condenser in such manner as to be substantially stationary during rotation of said condenser, rollers carried by said weight and embracing said cam on said piston from opposite sides so as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compressor, said suction conduit bein formed of relatively to each other fixed an immovable parts. i

9. In a rotary refrigerating machine the combination of a rotary condenser, said condenser consisting of two opposing yokes oined to one another, and two surrounding caps joined to each other and supported by said yokes, a compressor located within and rotated with said condenser and having a piston located coaxially with the axis of rotation of said condenser, means whereby said I piston is guided axially but'prevented from rotation relatively to said condenser, a cam on said piston, a weight pivotally mounted in said condenser in such manner as to be substantially stationary during rotation of said condenser, blocks adjustable in said weight, rollers carried b said blocks and embracing said cam on sai piston from opposite sides so as to cause said piston to perform longitudinal reciprocating movements during rotation of said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compressor, said suction conduit being formed of relatively to each other fixed and immovable parts.

10. In a rotary refrigerating machine the rcombination of a rotary condenser, said condenser consisting of two opposlng yokes joined to one another, and two surrounding capsjoined'to each other and supported by said yokes, a compressor having a cylinder located within and rotated with said condenser, and having a piston in said cylinder located coaxially with the axis of rotation of said condenser, said piston being provided with longitudinal grooves, said cylin der bein provided with corresponding longitudina grooves, balls inserted in said grooves in said piston and said vcylinder, said piston being provided with a cam, a weight pivotally mounted in said condenser in such manner as to be substantially stationary during rotation of said condenser, bl cks adjustable in said weight, rollers carried bysaid blocks and embracing said. cam on said piston from opposite sides so as to cause said piston to perform longitudinal reciprocating movements duringrot-ation of'said condenser, a cooler connected to said condenser, and a suction conduit from said cooler to said compressor, said suction conduit being formed of relatively to each other fixed and immovable parts.

ERIK WILHELM WALDENERZ 

